The 24-year-old wore green sleeves on her arms and a long red wig on her head. She accessorized with a pair of dangly earrings, a bangle and a choker, adding to the all-green effect with body paint that went from head to toe.

The “Without Me” songstress shared two images of the look, captioning them, “Halsey Presents: Gotham City 🌿🦇 party time.”

In the 1997 film “Batman and Robin,” Poison Ivy was portrayed by Uma Thurman. Halsey’s take on the look was more skin-baring than Thurman’s. In the movie, the “Pulp Fiction” actress dressed in shiny green tights and a bedazzled bodysuit, tying her look together with a green headscarf.

Uma Thurman as Poison Ivy.

CREDIT: Shutterstock

Halsey’s sensual look came at her own Halloween party, a Gotham-themed affair held Friday. The fête came just days after rumors began flying of a breakup between the star and her on-off boyfriend, rapper G-Eazy.